<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>聊天室</title>
</head>
<body>
    <div id="contents" style="height:500px;overflow:auto;"></div>
    <div>
        <textarea id="msg"></textarea>
        <a href="javascript:;" onclick="sendMsg()">发送</a>
    </div>

<!-- jQuery -->
<script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript">
    var ws = new WebSocket("ws://127.0.0.1:2222/chat");
    ws.onmessage = function(e) {
        $("#contents").append("<p>" + e.data + "</p>");
    };
    function sendMsg() {
        var msg = $("#msg").val();
        ws.send(msg);
        $("#msg").val("");
    }
</script>
</body>
</html>


